I am using the same thing as well. Instead of using the free app, i have purchased the paid app BM3 which can monitor 4 batteries simultaneously and also export the data.
Your car charges the batteries at +14V while driving but my car only charges at +-13.7V while driving. This is one thing that i observed after the dealer replaced the wiring. Previously my car also charged at +14V.
Attached is the graph i have for a typical day:
This is the BM3 app
Your car charges the batteries at +14V while driving but my car only charges at +-13.7V while driving. This is one thing that i observed after the dealer replaced the wiring. Previously my car also charged at +14V.
Attached is the graph i have for a typical day:
This is the BM3 app